Sony TRINITRON PVM-8041Q Service Manual page 29

PVM-8041Q/8044Q
2. PAL COLOR ADJUSTMENT (RV110)
(1) Receive PAL color bar signal (75% color bar).
(2) Connect an oscilloscope to IC124 pin-® (B-OUT).
(3) Adjust RV110 (PAL-COL) so that waveform peaks should have
the same level (most flat).
(Adjust so that the first and the 4th
(B-OUT) peaks should have the same level.)
„_L
less than 40mV p-p
Ln
3. PAL-COLOR-(R-Y) ADJUSTMENT (RV105)
(1) Connect an oscilloscope to IC124 pin-© (R-OUT).
(2) Adjust R V105 (PAL-COL-(R-Y)) so that waveform peaks should
have the same level (most flat).
A
(R-OUT) |ess than 60mV
i
*
k
n
less than 20mV
(Adjust for B=D. [less than 20mV] Also level difference
between B and C should be less than 60mV.)
CHROMA H PULSE POSITION ADJUSTMENT
(RV101.RV102)
(1) Receive the SECAM color bar signal.
(The left edge of the screen should not be colored.)
(2) Set to the under-scan mode.
(3) Adjust RV101 (PLUSE-W1DTH) until the point immediately
before the color on the left edge of the screen disappears.
(4) Release the under-scan mode.
(5) Set the HV DELAY mode.
(6) Adjust R V102 (PULSE-POSI) untill the point immediately before
the rising color of the image after back porch diappears.
Note : If imagephaseadjustmentorHV DELAY amount adjustment
during HV DELAY is performed after completing the
adjustment in this section, re-adjustments will be required.
Therefore, performed thisadjustmentafterthe two mentioned
have been performed.
| SUB-SHARP ADJUSTMENT (RV205) |
(1) Receive a sweep signal (or multi-burst).
* • Bandwidth should be more than 10MHz (flat).
• Composite sync should be included.
• Turn burst off.
(2) Connect an oscilloscope to IC124 pin-® (G-OUT).
(3) Adjust RV205 (SUB-SHARP) as shown.
0.5MHz 6MHz
Example of sweep signal output waveform
[specification]
6MHz/0.5MHz=0±0.5dB